If you have a paid subcription, the Translation Memory feature is automatically enabled on your account. This feature memorizes all the translations added to the projects on your account, including the deleted ones, and allows you to use them again in your current and future localization projects.
In Account Settings, you can grant Translation Memory Access to the users contributing to your projects. Here, you can also enable TM suggestions.
How the Translation Memory works
Each time a user translates a term, the translation is stored immediately in the TM database. The TM database stores one translation per user for each term, which gets updated each time the same user edits it in the interface. In case a different user adds a different translation for the same term, it will also get stored in the Translation Memory database.
The TM feature works with exact matches. If it does not find any exact matches with a term, it also looks at the value in the Reference Language (if one is set). If it finds an exact match with the string in the Reference Language, it suggests translations based on it, even if the term is different.
If there is more than one translation variant for a term in the Translation Memory, the TM will generate a list of suggestion, so you choose your preferred translation. The TM will always list the translations according to how many times they were used.
Translation Memory suggestions
Translation Memory suggestions do not appear in the language pages of your project unless 'TM Suggestions' is set to ON in Account Settings.
If a translation box is empty and there is at least one translation stored in the TM database for its corresponding term, it will be suggested under the translation box.
Press Use if you want to add a suggested translation to an empty translation box.
Using the Translation Memory feature
To bulk load translations to the empty translation boxes of a language, go to the side menu in the language page, click on the button that says Translation Memory and then on Start searching. The TM will search through all your translations and display a list of all possible options for your current language. You can remove from this list the ones that you don't need.